Engine-muffler.



C. E. DE WITT.

ENGINE MUFFLEB.

APPLICATION FILED 11ov.29, 1912.

1,061,272.y y Patented May 13, 1913.

'ul CU l` l-i f 1;` di t g 1 '1 f v di!" CLARENCE E. DE WITT, D1? MOUNT JEWETT, PENNSYLVANIA.

ENGINE-MUFFLER.

Specification of Letters Patent.

Patented May 13, 1913.

To all whom t may concern Be it known that I, CLARENCE E. DE WITT, a citizenof the United States, residing at Mount Jewett, in the county of McKean and Sta-te of Pennsylvania, have invented certain new and useful Improvements in Engine-Muiliers; and I do hereby declare the following to be a full, clear, and exact description of the invention, suoli .as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mulilers for engines and has for its object to provide an specifically claimed.

In order that its construction and operation 'may be readily comprehended, I will now proceed to fully describe my invention, in connection with the accompanying drawings which illustrate an improved embodiment thereof in which,-'`

Figure 1 is a longitudinal sectional view of my improved muiller. Fig. 2 isa transverse sectional view on the line 2 2 of Fig.1. Fig. "3 is a side elevation view of one of the mutller sections, and Figa. 4 is an enlarged fragmental sectional detail view.

Referring to these drawings in which similar reference characters correspond with similar parts throughout the several views; the cylindrical sections 5 are each provided with a reduced end port-ion 6, which, in the present instance consists of rings or short cylindrical sections which'extend into the sections' and are secured theretoby means of rivets 7. The reduced end portion 6 of one muler section extends into the opposite end of the contiguous muil'ler section and fits snugly therein,l so that as many of the muffler sections as necessary may be thus fitted together, soA as to form an elongated cylindrical body, as illustrated in Fig. 1. Securedwithin each muiler section is a hollow truste-conical member 8, having its base fitted snugly within the inner wall of the Application lei November 29, l1912. Serial No. 734,112..

cylinder 5 and secured thereto, by means oit rivets 9. ,When the inutller sections are fitted together, each ofthe Jfrusto-conical members 8except'the last one toward'the exhaust outlet, extends into proximity with the hase of the adjacent frusto-conical member.

T ie cylindrical section and thev exhaust out#v let end are not essentially' provided with a reduced portion, as no other similar section is litted thereon, but for the purpose of uniforniity and interchangeability of all the parts, I preferably form all of the sections exactly alike. Cylinder heads 10 areitted upon the opposite ends of the muliler and each cylinder head is preferably in the form of a disk having central bosses 11,'and being. centrally apertured through the bosses and screw threaded for the reception of an outlet Vpipe 12 and an inlet pipe 13. The cylinder' heads 10 are provided with `apertures 14 near their peripheries, and bolts -15 extend through the apertures 14 and connect the cylinder heads, nuts 16 being provided on both ends of each bolt 15, so that the bolts may be easily removed from either end of the muffler, and one or more Vsections thereof may be removed from either end, without disturbing the sections at the other end.

Surrounding the inner casing, which consists oi" the cylindrical sections 5 and the bolts 15 which connect them together, is a heat insulating jacket 17, preferably of asbestos, this acket being between the bolts 15 and the'outer wall of said inner casing. Surrounding the jacket 17 and the bolts 15 is an outer casing 18, preferably of cylindrical form and preferablyof metal. The heads o r disks 10 are each provided with a circumferential'tlange 19, in which therespective ends of the cylindrical casing 18 are seated.`

In practice, the exhaust fluid enters at 13 and passes through the sections 5 and their respective diverging elements 8, and finally exits through the exhaust outlet pipe 12. v

The inlet, or nozzle 20 of each member 8,

is substantially-of the same diameter as the interior of the outlet and inlet pipes, 12 and- 13, respectively, so that the exhaust fluid is not unduly retarded within the muiler.

It will be seen that air-chamber 21l surrounds the jacket 17, so that the sound is l mutlled by the air in the chamber 21, as well as by the jacket 17 and it will also be seen lthat the minimum radiation of heat from let end of the mul'ller.

the muffler results from saidjacket 17 and lair-chamber 21.

It will be seen that I have provided a device of this character which is fully capable of attaining the foregoing objects and in a thoroughly practical and elicient manner.

I do not limit my invention to the exact details of construction, combination andarrangement of parts, as herewith illustrated and described, but my invention may only be limited by a reasonable interpretation of the claims'.

I claim:

l. A muliler comprising a plurality of removable and replaceable sections, each section comprising a. short cylinder shaped at its ends toA connect with the adjacent cylinders, and a truste-conical member.

2. A mul'ller comprising a plurality of removable and replaceable sect-ions, each section having at its exhaust end a reduced portion to enter the inlet end of the adjacent section, and a :trusto-conical member the smaller end of which projects toward the in 3. A muffler comprising a plurality of removable and replaceable sections, each section having at its exhaust end a reduced portion to enter the inlet end of the adjacent section, and a frusto-conical member the smaller end of which projects toward the inlet end of the muffler, While its larger end lits snugly in the cylinder and abuts against the end of the adjacent section.

4. A mulller comprisingfa plurality of removable sections each of whlch comprises a short cylinder reduced at one end to fit into the cylinder of the adjacent section and the insulating cylinder and the metal outer cylinder serving to space them apart and passing through the heads, and nuts on the ends of the bolts and Abearing against the heads.

ln testimony whereof have signedl my name to this specification in the presence of two subscribing witnesses.

CLARENCE E. DE WITT.

Witnesses J. C. MOORHEAD, A. VERN MILLER. 

